W415-1117 / A / 03.11.14
38
IOM
IOM
13.0 CONVERSIONS
13.3 CONVERSION STEPS
13.4 CHECKING THE INLET GAS PRESSURE
13.1 HIGH ALTITUDE CONVERSION
13.2 NATURAL TO LP GAS CONVERSION
H18.1
In Canada, the modi
fi
cations for high altitude are based on a 10% reduction of input capacity for elevations
from 2000 - 4500 feet (610m - 1372m).
In the United States, the modi
fi
cations for high altitude are based on a 4% reduction of input capacity for every
1000 feet (305m) above 2000 feet (610m) above sea level. Table 6 illustrates the impact of altitude for selected
elevations. Consult with local fuel suppliers or authorities to determine local regulations or customs.
H18.2A
This series furnace is manufactured as a natural gas appliance that may be converted to LP gas through use of
the
Conversion Kit part number W370-0018
. This kit contains the conversion kit instructions, ori
fi
ces needed
for all models, the regulator spring for the gas valve, and a label to af
fi
x adjacent to the appliance rating plate to
alert subsequent service technicians of the conversion.
The parts removed for this conversion must remain
with the furnace for any future conversion back to natural gas.
Input
K/Btu/hr
ALTITUDE
ORIFICE SIZE (DMS)
NATURAL
LP GAS
40/60/80
100/120
0-2000 (0-610 m)
45
55
2000-3000 (610-914 m)
48
56
3000-4000 (914-1219 m)
49
57
4000-5000 (1219-1524 m)
50
58
5000-6000 (1524-1829 m)
51
60
6000-7000 (1829-2134 m)
52
61
7000-8000 (2134-2438 m)
53
62
8000-9000 (2438-2743 m)
54
63
9000-10000 (2743-3048 m)
55
65
Input
K/Btu/hr
ALTITUDE
ORIFICE SIZE (DMS)
NATURAL
LP GAS
30
0-2000 (0-610 m)
50
57
2000-3000 (610-914 m)
53
58
3000-4000 (914-1219 m)
54
59
4000-5000 (1219-1524 m)
55
60
5000-6000 (1524-1829 m)
56
62
6000-7000 (1829-2134 m)
57
63
7000-8000 (2134-2438 m)
58
64
8000-9000 (2438-2743 m)
59
65
9000-10000 (2743-3048 m)
60
67
TABLE 6 - HIGH ALTITUDE SPECIFICATIONS (U.S.A.)
Gas input ratings are certifi ed for elevations to 2000 ft. (610 m). For elevations above 2000 ft (610 m), reduce ratings 2% for each 1000 ft
(309 m) above sea level.
H12.8.1
H18.3
Refer to Conversion NG to LP Kit (W370-0018) for complete instruction.
WHITE-RODGERS 36J24-214 SINGLE STAGE GAS VALVE
1. Turn off the gas and electrical supply to the furnace.
2. Back inlet pressure test screw (inlet pressure boss, see FIGURE 28 & 29) counterclockwise out one turn
maximum, with a 3/32” Allen wrench. Attach a hose and calibrated U-tube or digital manometer to the inlet
pressure boss. Hose should overlap boss 3/8”. The manometer must have a scale range of at least 0” to
15” of water column.
3. Turn ON the gas and electrical supply and operate the furnace and all other gas consuming appliances on
the same gas supply line. Using a leak detection solution, check for leaks around the gas valve/manifold
connection and the burner ori
fi
ces. Repair any leaks before continuing.
4. Measure furnace gas inlet pressure with burners
fi
ring. Inlet pressure must be within the range speci
fi
ed on
the furnace rating plate. 5-7” w.c. (Natural Gas) or 11-13” w.c. (LP).
If the inlet pressure differs from the rating plate, make the necessary adjustments to pressure regulator,
gas piping size, etc. and/or consult with local gas utility.
5. Turn off gas and electrical supply to furnace, remove the manometer hose from the inlet pressure tap boss,
and tighten the inlet pressure tap screw using the 3/32” Allen wrench. (Clockwise, 7 in-lb minimum).
6. Turn on the gas supply and electrical power to the furnace.
